Concise synthesis of cycloheptatrienes from aldehydes and the Wittig reagent prepared from pyruvic ester
作者:Tomoyuki Yoshimura、Kanta Chino、Jun-ichi Matsuo
DOI:10.1016/j.tetlet.2021.153150
日期:2021.6
and concise synthesis of 1,3,5-cycloheptatrienes has been developed. The reaction of 4-substituted-4-pentenal derivatives with the Wittig reagent prepared from pyruvic ester under the optimal conditions proceeded to give 1,6-di- and 1,6,7-trisubstituted-1,3,5-cycloheptatrienes in moderate yield. The synthesis is advantageous through its use of readily available reagents, milder reaction conditions compared
已开发出 1,3,5-环庚三烯的新型简明合成方法。4-取代-4-戊烯醛衍生物与丙酮酸酯制备的Wittig试剂在最佳条件下反应得到1,6-二-和1,6,7-三取代-1,3,5-环庚三烯。屈服。该合成通过使用容易获得的试剂、与先前报道的那些相比更温和的反应条件以及简单的操作而具有优势。此外,基于反应产物,提出了通过分子内 [4+2] 环加成和降芴烯扩环的合理机制。